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T0 @ZZ whom t may concern i j Be it lrnown that we, AEMA.Nonne Ferrero and' `l7IroCALDnnAno, both subjects of the King of lltaly, and both residingat 300 Corso `Umberto7 Rome, in the Kingdom of ltaly,have invented certain new and useful improvements in Fire Bars, ofwhich the following is a specification', reference being had-therein to the accompanying drawing. for usewith solid fuel.

The fire bar according to the invention consists of two members which are arranged in an inclined position and contact at' their lower edges so as to form an acute "angle betweenthem with `the aperture towards the grate area. `"lhe two bar members are made of strips of sheet iron `or section iron and they are provided on their inside faces with projections; ridges or the like which extend lengthwise of the members approximately along` the center line thereof, the projections of two cooperatingbar membersbeing so shaped and arranged that they engage each other and form the bottom of an open channel which extends lengthwise of the bar and is intended to contain ashes or like combustion products. The bar members are seated in transverse frames which hold them in their respective inclined position and by in- Hterposing lifting-pieces between the bottom wall of the seat and the lower contacting edges of the bar members it is possible to alter the angle formedby the two members and to increase the aperture on the grate area and diminish in this way the air space between the bars` In order that the invention may be readilyy understoodthe same will be described with reference to the annexed drawing wherein Figures l and 2 show sectional views of two different constructional forms of the bars with the holding frames; Figure 3 is a plan.

view thereof; and Figure 4 is a sectional view of a form of lthe invention as shown in Figure 2 with the lifting piece beneath the lower edges of the bar members As shown in the drawings, the lire bar consists of two members 1 and 2 which in the example shown in Figure `1 are of sheet iron with a projection formed therein in the shape of a ridge 3 and in the construction illustrated in Figure 2 are of section iron with a web-like projection' 4;. 'llhese proj ec- 1922. sanar ne.

tions extend len approximately The lcooperatin in an inclined their lower edges an acute angle with the a the grate area. T associated bar and enga-g e formed. length upper channel 5 of sub 4shape and openingl and a lower channe angular shape vbetween the cting edges The fire bars which are arrangerV ends of the bar such *ai way that there 4ar ing points 8, 9 betwe end of each barim'em desirable frictional tions of the bars. the bar member the seat 7 anditis or lifts l5 of suit gthwise of the bar members at the center line thereof. g barinenibers are arranged so as to contact at and to form between them perture towards he projections onthe two i members are facing each other e one another so that two chan! wise of the bar, an stantially trapezoidal towards the grate area antially tri` projections and `of the bar members. are held in seats 7 in frames 10 l transversely below the 7 being shaped in e only two contacti en the frame and one ber in order to avoidun contacts deformalhe contacting edges of he bottom wall of evident that when strips r able ,thickness are intertween the bottom wall and the conges of the bar member hesse members will b and their aperture on t creased and the airsp neighbouring The invention relates to Grate or fire bars l 6 of' subst s, the seats face williil tion produc l ported almost exclusivel mass of ashes or t the fire and to a minimum slag or cinder up of the bars is efli i only facilitates grates, but is als ll thus be supy by the refractory he like and contact between area will be reduced ln this way, adhesion of re bars and a choking caciously avoided and the cleaning of the o conducive to a great economy of fuel and to amore uniform and regular combustion pro longerlife of the iiin `tected against errcessi circulation inside th along their outside s of the bars the metallic cess andaids for a e bars which are p ve heat also by the air e lower channels 6` and Deformations e longitudinal e required rid prevent bends felt in verare avoided by th projections which assure th gidityof the bar members an ing stresses making themselve Q. i f n tical or horizontal directions. The intention also avoids all danger of the bar mem bers falling into the ash-pit, as they are securely held within the seats in the transverse ytrames. Each bar member may be separate ly removed and replaced when necessary and the longitudinal projections are so ar ranged that the bar member may be inverted and the lower edge be turned upward when Vthe upper edge has become unserviceable.

` and the bottom or the seats so as to increase the divergence of the members, whereby the opening ot the bar onthe grate area is increased and the width ot' the air space diminished. v. y l

`The bar members are easily constructed of one single strip of sheet iron or ot section iron having a thickness of from l to 3 millimeters according to the length required tor the grate and the ridges in the sheet iron may be readily produced by a rolling mill or thelile. The bars are Very light on account of the channelsprovided therein, and the bar members are easily transported and stored, as they may be placed one above the other in hea-ps, which feature is particularly important when yused on ships.

What we claim is: l. In a grate, a grate bar for use with solid uel, comprisingv two bar members :iry ranged in an inclined position with their lower edges in rontact, longitudinal projections on the bar members approximately along their center line, the projections tacingand engaging each other, and transversely arranged trames provided with seats tor supporting the bar members and holding them in inclined position`r the bar members rest-ing on their seats in this trame at their contacting lower edges.

2. ln a girate` a grate bar for use with solid fuel, comprising two bar members arranged in an inclined position with their lower edges in Contact, longitudinal pro je'ctions on the bar members approximately along their center line, the projections faring and engaging yeach other, transversely arranged trames provided with seats for supporting the bar members and, holding them in inclined position, and lifts interposed between the lower edges of said members and the bottoms ot said seats.

ln testimony whereof we, the said EMAN- UELE Berro and Vrro CALDnRAno, have signed this specication at Rome, Italy, this 31st day otMay, 1922.

EMANUELE RUFFO. VITO CALDERARO. In the presence of- ANGELA CAnor'roNi, TARILLA FONHARY. 

